Anythng that gives the desired result will work. I prefer a switch conveniently mounted so I don't have to undo a hold-down strap or unlock the battery box to get to it. You are more likely to do it every time if it's convenient to get to. I built a double battery box and mounted a Blue Sea switch from the inside with the knob acessible from the exterior. I can look at it and tell if the batteries are on or off. As a sidenote, I hooked the wire from the breakaway switch to the always hot side of the battery switch so it is still functional even if I'm towing with the battery switch turned off.

RobYoung....talk to me about the solar trickle-charger! I've been looking at them for awhile, waiting for the prices to drop ... Are they really worth the money? I've been told that unless you go for a couple of large panels you probably won't even maintain your daily usage. What say you, oh experienced one?